Maysor (Kazakh: Майсор; Russian: Майсор) is a salt lake in the Ekibastuz City Administration, Pavlodar Region, Kazakhstan.

Maysor is located 10 kilometers (6.2 mi) to the southwest of Ekibastuz city. Ekibastuz Airport lies 0.8 kilometers (0.50 mi) to the south.

Maysor is an endorheic lake in the basin of the Irtysh river. Some sections of the shore have clusters of reeds. There are several small lakes in the surrounding area.

Maysor fills with precipitation and groundwater. The lake has water all year round. Its surface freezes in the second half of November and thaws in the second half of April.

• List of lakes of Kazakhstan

• Media related to Maysor (Irtysh basin) at Wikimedia Commons